| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Yuichi Takase |
| Physics operator(s): | Unknown |
| Engineering operator(s): | Unknown |
| Engineering Operator Run Comment |
| Rf |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:13:663PM |
| Author: To Be Determined |
| Day 1 of H-mode run Starting from 950331038 Scan density and plasma equilibrium (outer gap, X-point, etc.) After a slow start because of problems with RF fault detection circuits and plasma control, we had a productive run (shots 013 - 025) and were able to explore effects of plasma equilibrium (outer gap, X-point position) and target density. The outer gap was varied from 1.2cm to 2.2cm, and some variation of the X-point location was attempted. The target density was varied over a limited range, nel_04=1.0e20 to 1.3e20. Contrary to expectations, higher H-factors were obtained with more gas puffing (higher density). Over the limited range of X-point locations investigated, there were no great changes in the H-factor. Even with a relatively small gap of 1.2cm we were able to obtain a reasonable H-mode (shot 013). The highest H-factor obtained today was about 1.35, comparable to the best achieved so far (up to about 1.4). We will continue H-mode studies tomorrow, starting with a current scan. Shot 001 pl disrupted early 002 pl lowered Ip, disrupted early 003 fiz loaded 950502031 004 pl early disruption --- cell access to fix antenna diagnostics 005 fiz 006 pl disrupt @ 0.7sec 007 pl lasted till 1.0sec, D:0.85MW, E:0.7MW, ramping density 008 fiz 009 fiz 010 pl disrupt @ 0.75sec 011 pl disrupt @ 0.67sec 012 fiz 013 pla H-mode, first full shot, D:1.3MW, E:0.95MW nel_04(pre-RF)=1.15e20, Rgap=1.2cm, zmagx=-0.5cm, W_EFIT=91kJ --- delay, computer problem 014 pla no H-mode, D:0.85MW, E:0.5MW nel_04(pre-RF)=1.15e20, Rgap=1.5cm, zmagx=-0.7cm, W_EFIT=65kJ 015 pla weak H-mode, D:0.8MW, E:0.5MW nel_04(pre-RF)=1.12e20, Rgap=1.7cm, zmagx=-0.5cm, W_EFIT=82kJ 016 pla weak H-mode, D:1.0MW, E:0.6MW nel_04(pre-RF)=1.13e20, Rgap=1.7cm, zmagx=-0.4cm, W_EFIT=82kJ 017 pla programmed Xpt down by 0.5cm H-mode, D:1.4MW, E:0.65MW nel_04(pre-RF)=1.10e20, Rgap=1.7cm, zmagx=-0.5cm, W_EFIT=91kJ 018 pla larger outer gap H-mode, D:1.4MW, E:0.65MW nel_04(pre-RF)=1.0e20, Rgap=1.9cm, zmagx=-0.6cm, W_EFIT=89kJ 019 pla moved X-pt in and down, less density programming during RF H-mode, D:1.45MW, E:0.7MW nel_04(pre-RF)=1.0e20, Rgap=2.0cm, zmagx=-0.6cm, W_EFIT=87kJ 020 pla lower density H-mode, D:1.3MW, E:0.6MW nel_04(pre-RF)=1.0e20, Rgap=2.1cm, zmagx=-0.4cm, W_EFIT=80kJ 021 pla cut gas puffing down (prior to rf) weak H-mode, D:1.3MW, E:0.6MW nel_04(pre-RF)=0.84e20, Rgap=2.2cm, zmagx=-0.7cm, W_EFIT=74kJ 022 pla higher density (programmed to 1.4e20), disrupt @ 0.49sec 023 pla H-mode, D:1.3MW, E:0.6MW, disrupted @ 0.82sec nel_04(pre-RF)=1.3e20, Rgap=2.0cm, zmagx=-0.6cm, W_EFIT=91kJ 024 pla RCUR ramp 2.5mm outward over 0.72 to 0.8sec no H-mode, D:1.3MW, E:0.55MW, disrupted @ 0.78sec nel_04(pre-RF)=1.3e20, Rgap=2.2cm, zmagx=-0.6cm, W_EFIT=65kJ 025 pla load density programming from shot 018 H-mode, D:1.3MW, E:0.6MW, disrupted @ 0.87sec nel_04(pre-RF)=1.0e20, Rgap=2.0->1.2cm, zmagx=-0.5cm, W_EFIT=85kJ |
| Physics Operator Summaries |
| Session Leader Comments | |||
| May 4 1995 01:42:52:120PM | 950504001 | Yuichi Takase | Day 1 of H-mode run
Starting from 950331038 Scan density and plasma equilibrium (outer gap, X-point, etc.) shot 001 disrupted early |
| May 4 1995 01:43:54:970PM | 950504002 | Yuichi Takase | shot 002 lowered Ip, disrupted early
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| May 4 1995 01:44:13:370PM | 950504003 | Yuichi Takase | shot 003 loaded 950502031
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| May 4 1995 01:44:34:660PM | 950504004 | Yuichi Takase | shot 004 early disruption
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| May 4 1995 01:45:09:760PM | 950504005 | Yuichi Takase | shot 005 shot delayed (cell access to fix antenna diagnostics)
fizzle |
| May 4 1995 01:45:35:440PM | 950504006 | Yuichi Takase | shot 006 disrupt @ 0.7sec
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| May 4 1995 01:45:52:630PM | 950504007 | Yuichi Takase | shot 007 lasted till 1.0sec, D:0.85MW, E:0.7MW, ramping density
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| May 4 1995 01:46:16:070PM | 950504008 | Yuichi Takase | shot 008 fizzle
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| May 4 1995 01:46:25:720PM | 950504009 | Yuichi Takase | shot 009 fizzle
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| May 4 1995 01:46:49:660PM | 950504010 | Yuichi Takase | shot 010 disrupt @ 0.75sec
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| May 4 1995 01:47:01:470PM | 950504011 | Yuichi Takase | shot 011 disrupt @ 0.67sec
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| May 4 1995 01:47:12:410PM | 950504012 | Yuichi Takase | shot 012 fizzle
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| May 4 1995 01:47:44:900PM | 950504013 | Yuichi Takase | shot 013 first full shot, D:1.3MW, E:0.95MW
H-mode |
| May 4 1995 01:59:02:200PM | 950504013 | Yuichi Takase | shot 013 first full shot, D:1.3MW, E:0.95MW
H-mode, nel_04(pre-RF)=1.15e20, Rgap=1.2cm, zmagx=-0.5cm, W_EFIT=91kJ |
| May 4 1995 02:17:34:130PM | 950504014 | Yuichi Takase | shot 014 no H-mode, D:0.85MW, E:0.5MW
nel_04(pre-RF)=1.15e20, Rgap=1.5cm, zmagx=-0.7cm, W_EFIT=65kJ |
| May 4 1995 02:28:11:160PM | 950504015 | Yuichi Takase | shot 015 weak H-mode, D:0.8MW, E:0.5MW
nel_04(pre-RF)=1.12e20, Rgap=1.7cm, zmagx=-0.5cm, W_EFIT=82kJ |
| May 4 1995 02:55:31:800PM | 950504016 | Yuichi Takase | shot 016 weak H-mode, D:1.0MW, E:0.6MW
nel_04(pre-RF)=1.13e20, Rgap=1.7cm, zmagx=-0.4cm, W_EFIT=82kJ |
| May 4 1995 02:56:44:390PM | 950504017 | Yuichi Takase | shot 017 programmed Xpt down by 0.5cm
H-mode, D:1.4MW, E:0.65MW nel_04(pre-RF)=1.10e20, Rgap=1.7cm, zmagx=-0.5cm, W_EFIT=91kJ |
| May 4 1995 04:17:30:000PM | 950504018 | Yuichi Takase | shot 018 larger outer gap
H-mode, D:1.4MW, E:0.65MW nel_04(pre-RF)=1.0e20, Rgap=1.9cm, zmagx=-0.6cm, W_EFIT=89kJ |
| May 4 1995 04:17:51:930PM | 950504019 | Yuichi Takase | shot 019 moved X-pt in and down, less density programming during RF
H-mode, D:1.45MW, E:0.7MW nel_04(pre-RF)=1.0e20, Rgap=2.0cm, zmagx=-0.6cm, W_EFIT=87kJ |
| May 4 1995 04:18:16:510PM | 950504020 | Yuichi Takase | shot 020 lower density
H-mode, D:1.3MW, E:0.6MW nel_04(pre-RF)=1.0e20, Rgap=2.1cm, zmagx=-0.4cm, W_EFIT=80kJ |
| May 4 1995 04:19:05:470PM | 950504021 | Yuichi Takase | shot 021 cut gas puffing down (prior to rf)
weak H-mode, D:1.3MW, E:0.6MW nel_04(pre-RF)=0.84e20, Rgap=2.2cm, zmagx=-0.7cm, W_EFIT=74kJ |
| May 4 1995 04:19:23:700PM | 950504022 | Yuichi Takase | shot 022 higher density (programmed to 1.4e20), disrupt @ 0.49sec
|
| May 4 1995 04:38:30:220PM | 950504023 | Yuichi Takase | shot 023 H-mode, D:1.3MW, E:0.6MW, disrupted @ 0.82sec
nel_04(pre-RF)=1.3e20, Rgap=2.0cm, zmagx=-0.6cm, W_EFIT=91kJ |
| May 4 1995 06:07:11:320PM | 950504024 | Yuichi Takase | shot 024 RCUR ramp 2.5mm outward over 0.72 to 0.8sec
no H-mode, D:1.3MW, E:0.55MW, disrupted @ 0.78sec nel_04(pre-RF)=1.3e20, Rgap=2.2cm, zmagx=-0.6cm, W_EFIT=65kJ |
| May 4 1995 06:07:44:100PM | 950504025 | Yuichi Takase | shot 025 load density programming from shot 018
H-mode, D:1.3MW, E:0.6MW, disrupted @ 0.87sec nel_04(pre-RF)=1.0e20, Rgap=2.0->1.2cm, zmagx=-0.5cm, W_EFIT=85kJ |
| Physics Operator Comments |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:32:31:410AM | Plasma | Ok | |
| 2 | 08:50:10:940AM | Plasma | Ok | |
| 3 | 09:09:31:080AM | Plasma | Ok | |
| 4 | 09:20:37:790AM | Plasma | Ok | |
| 5 | 11:07:31:080AM | Plasma | Ok | |
| 6 | 11:17:50:980AM | Plasma | Ok | |
| 7 | 11:34:55:530AM | Plasma | Ok | |
| 8 | 11:57:34:170AM | Plasma | Ok | |
| 9 | 12:14:39:740PM | Plasma | Ok | |
| 10 | 12:30:11:840PM | Plasma | Ok | |
| 11 | 12:46:26:280PM | Plasma | Ok | |
| 12 | 01:05:53:900PM | Plasma | Ok | No Faults. |
| 13 | 01:19:43:080PM | Plasma | Ok | No Faults. |
| 14 | 01:57:12:480PM | Plasma | Ok | No Faults. |
| 15 | 02:11:42:490PM | Plasma | Ok | No Faults. |
| 16 | 02:27:32:100PM | Plasma | Ok | |
| 17 | 02:43:52:170PM | Plasma | Ok | No Faults |
| 18 | 02:59:14:470PM | Plasma | Ok | No Faults. |
| 19 | 03:17:45:420PM | Plasma | Ok | No Faults |
| 20 | 03:32:26:100PM | Plasma | Ok | No Faults |
| 21 | 03:46:45:060PM | Plasma | Ok | No Faults. |
| 22 | 04:01:56:610PM | Plasma | Ok | No Faults. |
| 23 | 04:17:15:900PM | Plasma | Ok | No Faults. |
| 24 | 04:35:23:980PM | Plasma | Ok | No Faults |
| 25 | 04:51:11:710PM | Plasma | Ok | No Faults |
| 26 | 05:09:30:730PM | Test | Ok | Scanner test |
| 27 | 05:28:23:760PM | Test | Ok | scanner test |
| 28 | 05:45:37:820PM | Test | Ok | Scanner test |